When did the lack of traditional culture begin?

During the Yuan Dynasty, because the Han people were reduced to the fourth class and had a hard life, a large number of cultural classics were destroyed, which was the first time they were missing.

After the Ming Dynasty, Zhu (Southern Song Dynasty), who reformed Confucian culture, became popular, and excellent Confucian culture such as understanding, unity of knowledge and action was misinterpreted and eliminated. This is the second case of disappearance.

The invasion of foreign culture in the late Qing Dynasty led to the third loss.

After the founding of the People's Republic of China, after "letting a hundred flowers blossom, a hundred schools of thought contend" and "shouting loudly", traditional culture completely disappeared. This is the fourth time I've disappeared.

The current situation is that traditional culture and modern culture are in a period of mutual integration, and when they are completely integrated, they will become traditional culture.